# Katrillion vs. Quadrillion — Which is Correct Spelling?

Edited by Urooj Arif — By Rabia Sajjad — Updated on April 16, 2024
"Katrillion" is the incorrect spelling of "quadrillion." "Quadrillion" refers to the number 1,000,000,000,000,000, which is a thousand trillion.

## Which is correct: Katrillion or Quadrillion

### Katrillion

Incorrect Spelling

Correct Spelling

## Key Differences

Remember, “quadrillion” is part of the standard series in large numbers, which follows a logical progression: million, billion, trillion, then quadrillion.
The correct spelling, "quadrillion," is derived from the Latin "quadri-" for four, indicating it is the fourth power of a thousand after million, billion, and trillion.

## How Do You Spell Quadrillion Correctly?

Incorrect: I can’t count to a katrillion.
Correct: I can’t count to a quadrillion.
Incorrect: It felt like a katrillion degrees outside.
Correct: It felt like a quadrillion degrees outside.
Incorrect: Their project won’t cost a katrillion dollars.
Correct: Their project won’t cost a quadrillion dollars.
Incorrect: She joked about having a katrillion followers.
Incorrect: He claimed to have a katrillion ideas.
Correct: He claimed to have a quadrillion ideas.

The number equal to 1,000 trillions, or 10^15.
It would take a quadrillion steps to reach the next galaxy.
A hyperbolic term for an extremely large number.
He has a quadrillion things on his mind right now.
Used figuratively to express an immeasurably high number.
A quadrillion particles of dust appeared in the sunlight.
Represents an unimaginable quantity or magnitude in scientific contexts.
The universe contains quadrillions of stars.
The cardinal number equal to 1015.
Chiefly British The cardinal number equal to 1024.
A thousand trillion ([https://en.wikipedia.org/wiki/Long_and_short_scales#Comparison logic: 1,000 × 1,000^4]): 1 followed by fifteen zeros, 1015.
A million trillion ([https://en.wikipedia.org/wiki/Long_and_short_scales#Comparison logic: 1,000 × 1,000,000^2]): 1 followed by twenty-four zeros, 1024.
Any very large number, exceeding normal description.
According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.
The number that is represented as a one followed by 24 zeros;
In England they call a septillion a quadrillion
The number that is represented as a one followed by 15 zeros
In British English, formerly used to mean a million raised to the power of four (10^24), but now generally aligned with the American usage.
A British quadrillion used to be much larger than an American quadrillion.

## Quadrillion Meaning in a Sentence

Every star in the sky seems like a quadrillion miles away.
A quadrillion calculations per second are performed by modern supercomputers.
He exaggerated the number of attendees as a quadrillion.
The chances of that happening are one in a quadrillion.

#### A quadrillion and one things to do

Used to describe an overwhelming number of tasks or responsibilities.
She felt like she had a quadrillion and one things to do before the day ended.

Used to express something being very far or nearly unreachable.
The remote island felt a quadrillion miles away.

A phrase to emphasize something or someone's uniqueness among vast numbers.
His invention isn't just another quadrillion; it's truly revolutionary.

Something incredibly rare or nearly impossible.
Winning the lottery is one in a quadrillion.

## Common Curiosities

#### How many syllables are in quadrillion?

There are three syllables in "quadrillion."

#### What is the verb form of quadrillion?

"Quadrillion" does not have a verb form as it is a noun.

#### Why is it called quadrillion?

It is called "quadrillion" because it comes from the Latin prefix "quadri-" meaning four, relating to the sequence in large numbers.

#### How is quadrillion used in a sentence?

"Quadrillion" is used as a noun to refer to the number 1,000,000,000,000,000.

#### Is quadrillion an abstract noun?

Yes, "quadrillion" is an abstract noun as it represents a concept rather than a physical object.

#### What is another term for quadrillion?

Another term for "quadrillion" is not commonly used, but it can be referred to as "one thousand trillion."

#### What is the opposite of quadrillion?

There isn't a direct opposite of "quadrillion," as it is a numerical value. However, one could refer to a significantly smaller number, like "one."

#### Is quadrillion a collective noun?

No, "quadrillion" is not a collective noun.

#### Is the word quadrillion imperative?

No, "quadrillion" as a noun does not serve as an imperative form.

#### Which determiner is used with quadrillion?

Determiners like "a," "one," or "several" can be used with "quadrillion," depending on the context.

#### Is the word quadrillion Gerund?

No, "quadrillion" is a noun, not a gerund.

#### Is the quadrillion term a metaphor?

"Quadrillion" itself is not a metaphor but can be used metaphorically to represent an extremely large number or quantity.

#### Which vowel is used before quadrillion?

The article "a" is used before "quadrillion," as it starts with a consonant sound.

#### Which conjunction is used with quadrillion?

Conjunctions like "and" or "or" can connect clauses involving "quadrillion."

#### Is quadrillion a countable noun?

Yes, "quadrillion" is a countable noun.

#### Which preposition is used with quadrillion?

Prepositions such as "of" (as in "a quadrillion of stars") are used with "quadrillion."

#### Which article is used with quadrillion?

The article "a" is typically used with "quadrillion," as in "a quadrillion stars."

#### Is quadrillion a negative or positive word?

"Quadrillion" is a neutral word; it simply describes a quantity.

#### Is quadrillion a vowel or consonant?

The word "quadrillion" starts with a consonant.

#### Is the word “quadrillion” a Direct object or an Indirect object?

In sentences, "quadrillion" can be a direct object (e.g., I need a quadrillion).

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